RangeError when comparing two objects with eql

[l0b0]

I'd like to use eql to compare two objects:

expect(tokenizeTagText(text)).to.eql([new TextField('only text field')]);

But I get this using mocha:

RangeError: Maximum call stack size exceeded

However, if I change the test to use equal, they look the same:

Error: expected [ { name: 'only text field',
markup: { '0': <input value="only text field">, length: 1 } } ] to equal [ { name: 'only text field',
markup: { '0': <input value="only text field">, length: 1 } } ]

It seems the RangeError comes from expect.js.

It seems the issue is with comparing jQuery elements:

it('failing', function () {
    expect([ { name: 'only text field',
            markup: { '0': $('<input value="only text field">'), length: 1 } } ]).to.eql([ { name: 'only text field',
            markup: { '0': $('<input value="only text field">'), length: 1 } } ]);
});
it('successful', function () {
    expect([ { name: 'only text field',
            markup: { '0': '<input value="only text field">', length: 1 } } ]).to.eql([ { name: 'only text field',
            markup: { '0': '<input value="only text field">', length: 1 } } ]);
});